Ignition breaker mounting



Aug- 3, 1954 c. v. CHERMENDY ET AL 2,685,624

IGNITION BREAKER MOUNTING 'Filed sept. 25, 1952 .YN VEN TOR. GHERME/VD Y H. BORG/VE L 7' www on W. 6 ME 5 w www u, `A C a a n 4 WAH? 2 ff 4 Vt* 3x3 WM M ,FOI F M mm w lll/Evi?.

Arr'r Patented Aug. 3, 1954 IGNITION BREAKER MOUNTING Carl V. Chermendy and Waldemar H. Borchelt,

Grand Rapids,

Mich.

Application September 25, 1952, Serial No. 311,516

(Cl. 20G- 30) Claims. l

This invention relates in general to an ignition breaker mounting and is more particularly described as a rotatable mounting for a movable spark advance type of ignition breaker. In ignition breaker mountings of this kind, it is customary to mount the movable parts close together upon correspondingly fitted metal elements. In ignition breakers, this practice becomes extremely detrimental as the breakers become used and worn since the friction of one metal part upon the other produces objectionable wearing and soon the movable parts are so worn that the ignition parts are not in the alignment for which they are intended. This results in the wider separation of the ignition points Y or a to and fro weaving motion which produces a variation in the engagement of the ignition cam and this causes pitting and burning of the ignition points or contacts and sometimes resulting in oxidation and bouncing of the points which may be extremely objectionable.

An important object of the invention is therefore in the provision of a rotatable mounting for an ignition breaker in which relatively rotatable parts are provided of diierent materials particularly at the points where they bear upon each other, one of the materials being non-metallic and preferablyl of a plastic composition commonly known as nylon or a similar wear resistant plastic having the same characteristics.

A further object of the invention is to provide a nylon ring seated between two parts of an assembled ignition breaker mounting in such a manner that the nylon ring is protected by metal parts on opposite sides thereof, but the Contact between the metal parts is upon the nylon ring and not upon similar wearing parts of metal.

A still further object of the invention is to provide a new and improved ignition breaker assembly mounting adapted to be used for ignition breakers of all kinds and to be used in connection with automatic spark advance tubes of installation.

Other objects of the invention will appear in the specication and will be apparent from the accompanying drawings, in which,

Fig. l is a plan View of an ignition breaker mounting in accordance with this invention and showing a conventional ignition circuit breaker on top thereof.

Fig. 2 is an exploded perspective View showing the parts of the breaker mounting in section; and

Fig. 3 is a sectional View of the circuit breaker parts in assembled relation.

A circuit breaker mounting of this kind is Cil particularly designed and intended for a movable spark advance type of ignition breakers which usually has a relatively iixed part and another plate movable with respect to the fixed part upon which the circuit breaker is mounted. The movable plate is then rotated in one direction or another depending upon whether the spark advance is to the right or to the left and thus varying the position of the breaker itself with respect to the cam which rotates within the breaker mounting.

Referring now more particularly to the drawings, an ignition breaker I0 of any type either of a new construction or of a conventional type as shown in Fig. 1 has a movable member I2 mounted for rotation about a post I4 with a spring I6 tending to press the outer end of the movable arm so that its contact I8 makes a ilat engagement with a relatively fixed contact 20. Mounted on the member l2 is a projection 22 preferably of fibrous material adapted to be engaged by a cam projection 24 of a rotatable cam 26.

Various types of ignition breakers are commonly used for different ignition breaker systems used principally upon the ignition systems of different automobiles and the exact construction of the ignition breaker has no particular part in this invention since all ignition breakers of this type are subject to the same objection, that is, that they will wear unduly if the ignition breakers are mounted upon the conventional type of mountings having metal to metal contacts of the parts.

In the present invention, the ignition breaker is mounted upon a top plate which preferably has a dat face on one side, a central opening 32 and an annular fiat projection 34 on the other or under side which has a shoulder 36 spaced from the inner periphery and a shoulder 38 spaced from the outer periphery of the plate.

A bottom plate 40 of slightly larger diameter than the top plate has a fiat surface on one side and an annular projection or rib 42 surrounding the central perforation 44 thereon on the other side. 'Ihis annular rib 42 is of a Width to nt the space upon the top plate between the inner periphery thereof and the shoulder 36 of its annular projection, the openings 32 and 44 of the top and bottom plates respectively being of the same diameter and adapted to t closely together. In order to attach these plates together, one of the plates as the top plate has threaded openings 4B into which small screws 48 are inserted through appropriate openings in the l bottom plate so that upon drawing the screws together more or less tightly, they will draw the plates together.

This construction of the top and bottom plates provides an annular recess between the two plates when they are fastened together, the recess extending from the outer shoulder 38 of the annular fiat projection to the outer peripheries of;` the plates andof the thickness ofi the fiat projection 34 such that a at mounting ring 52 of the proper diameter may be inserted therein. This ring is composed of a non-metallic iibrous or plastic material resistant to.wear such, for example, as a plastic commonlyT known as nylon which has a iiat pontioin fittingT closely between the upper and lower plates at. their outer edges but permittingl a free and., relative movement between the two plates fastened t'ogether and the nylon ring 52. At the outer edge.V of this ring and projecting therefrom at the outer side` around thev topplatev are 1 ears- 54 5 6: and.. 58 formediintegrally. with.the ring` and-,usually having, perfioratonsv 60. therethrough. 'I'he projections orv this-nylonI ring are-preferably. flat and the;A outside diameter of this .ring is. substantially the; sameas: that. of, thev bottomr plate with the top platell movable within they projections of ther-l nylon ring,

In; assembling; this construction, the mounting ring; 52. isfplacedbetween the top and bottom plates 30 and 40 before they are secured togethenby the screws 4B and it isseated within the-space ,proyided for it where it makesa continuous and-substantial. contact` with both of. the mounting. platesthroughout their entire outer periphery;

To disassemble the mounting, the ,screws -@Bare loosened-and; withdrawn and: the parts,V can be easily takenapartfor removal, replacement or repair: of.- any of,` these elements; In order to applya. newv breaker. arm. or. a; new ignition breaker, `it ,may belmore .simple to-remove-the, top plate 30 with one ignition breaker mounted thereoni andr to-substitutetherefor another similar top plate with; another' ignition breaker L thereon.

Thismountingassembly may be secured in placeA surrounding, a. central. camby; the perfo.- rated-iearst, Eand 58. inany suitable andwell known-.manner andlforr advancing--- and. retarding the-i spark, the entire mounting may. be moved by. an. arm.. 52 attached, by a` suitable. pivot 6.4. to the top plate and.` extending.. between anyv two of the projecting ears 56 and 58. Thisarmisrnoved endwise ini either. direction depending., upon, the direction necessary` to, correspondingly advance or retard the vspark in a-.well known manner.-

t With, this construction. the.. nylon mounting ring 52 which isrvery tough and resistant to wear, holds; the mounting plates at their peripheries relatively rigid andi out ofmoving` Contact with each other or with, any other. metal partso that the entireY mounting assembly'. is substantially free from wear and thereby retaining the alignment of any ignition breaker mounted upon the top-plate so that thereis no uneven movement of the ignition breaker mounting because of the minimum wear and no variation of the ignition points caused by continued use. The mounting ring 52 is easily replaced and there is no wear upon the metal plates because they do not come in `wearing contact with each other.

While a preferred construction of the invention has been described in some detail, it should be regarded as an illustration orexample rather than as ay limitation or restriction of the invention, since various changes in the construction, combination and arrangement of the parts may be, madewithout departing from the spirit and scope ofthe invention.

We claim;

1:.v A mounting for ignition breakers comprising a top plate and abottom plate, the plates having cooperating surfaces to provide an outer peripheral recess between them, a mounting ring seated in the recess between the parts at the periphery thereof, the twol plates: being of, metal. andl the mounting ringbeing of. a=.wea1: resistantv fibrous material, andY meansior. securing, the plates together withthemounting ring therebetween.

2. Af mounting in accordance with claim l, in which the two. plates. are. of metal. and., the mounting ringis ai wear resistant materiaL such asnylon relatively movable with respect tothe plates.

3. A mounting in, accordance.- with. claim, 2., in which the mounting ring isof. wear resistant fibrous` material, having aY plurality of.. integral earsextending. outwardly. at-one side of, the. ring at the periphery thereof.' and. receiving. the top plate withinv thev ears..

4. A mounting. in.- accordancewitm claim 3, in which the .integral ears of the mountingv ring. are provided with perforations; for attaching the ring-toa suitable supportsothat the plates may be -moved rotatably with-.respectto-the ring;

5. A mounting. for. ignition. breakers comprisingr. atop plate anda bottom. plate. the plates having projections from. their adjacent. surfaces whenplacedv togethen to provide a peripheral groove between them-.and-eachv having a central perforation, of.. the same diameten, a; mounting ring seated in the recessbetweenithe parts at the periphery.-A thereofand. having integral ears extending outwardly therefromrprojectingbeyond the periphery. of; the topfplate and having periorations therein. for. securing. the. ring in a.xed position, an. ignition. breaker. seated on the top plate. andhavingaprojection forf engaging a i cam rotatable inthe. central `recessgof the plate,.means for securing the plates together with the mounting. ring. rotatable with respect thereto, and meansengaging. one of. the plates for moving. it relativelyfto the said-mounting ringy for advancing and retarding theignitionbreaker relative to theV operating cam.

Name-1 Date Hubertf .June-29; 1909 NumberY 

